Overview

overview

10

Static

static

3

documents.exe

windows7-x64

10

documents.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    documents.exe

  • Size

    488KB

  • Sample

    250113-n8k2bs1nfw

  • MD5

    bf94dfb3c600fea20a0eb3b6f2ce410f

  • SHA1

    9be4b304813ff777c1f5aa753dabe2b4aeb07391

  • SHA256

    0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f

  • SHA512

    00c72914e7344bb25b20296cb215bd3c53246eb4b55ca176ffb2a9226444d0ba992699337c76815e6a127738a8d616e466f06e2b3808e73397dc54eddf60891a

  • SSDEEP

    6144:IuaNeIQv1dV4sXmFr7LAFIzT/72clnlePVTn0L9DEBDYTU6qynIHtc+KC:3SDQ3usXmFr70FGxlkn0LJYDiU6qyat

Score
10/10
remcosyavakosadiscoverypersistencerat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

C2

198.23.227.212:32583

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    yavascript.exe

  • copy_folder

    xenor

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-DCHPS3

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      documents.exe

    • Size

      488KB

    • MD5

      bf94dfb3c600fea20a0eb3b6f2ce410f

    • SHA1

      9be4b304813ff777c1f5aa753dabe2b4aeb07391

    • SHA256

      0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f

    • SHA512

      00c72914e7344bb25b20296cb215bd3c53246eb4b55ca176ffb2a9226444d0ba992699337c76815e6a127738a8d616e466f06e2b3808e73397dc54eddf60891a

    • SSDEEP

      6144:IuaNeIQv1dV4sXmFr7LAFIzT/72clnlePVTn0L9DEBDYTU6qynIHtc+KC:3SDQ3usXmFr70FGxlkn0LJYDiU6qyat

    Score
    10/10
    remcosyavakosadiscoverypersistencerat

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

      ratremcos

    • Remcos family

      remcos

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks